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Finding the Fourth Proportional to 70,149.87, 96,804 and 38,319.90

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Solution

The fourth proportional to 70,149.87, 96,804 and 38,319.90 is: 52,879.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,149.87 : 96,804 = 38,319.90 : x
  2. Step 2: Convert to fraction form
    70,149.87/96,804 = 38,319.90/x
  3. Step 3: Cross multiply
    70,149.87x = 96,804 × 38,319.90
  4. Step 4: Simplify right side
    70,149.87x = 3,709,519,599.60
  5. Step 5: Solve for x
    x = 3,709,519,599.60/70,149.87
  6. Step 6: Final answer
    x = 52,879.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.